Appendix A. Answers to the “Do I Know This Already?” Questions

Chapter 1

1. D. The switch uses the destination MAC address to identify the port out of which the packet should be forwarded.

2. B. A switch uses the MAC address table to limit the Layer 2 communication between only the two devices communicating with each other.

3. B. The destination IP address is used to locate the longest matching route and the outbound interface out which it should be forwarded.

4. D. Broadcast domains do not cross Layer 3 boundaries. Splitting a Layer 2 topology into multiple subnets and joining them with a router reduces the size of a broadcast domain.

5. B. The CAM is high-speed memory that contains the MAC address table.

6. D. A distributed architecture uses ...

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